Whoever is considering the purchase of a classic car should always take into account the chances that the car may not have documents/papers. Only a very meticulous person would care to keep the title documents in a safe place for over 30-40 years and over time, people die, move houses etc and things get lost and misplaced so looking for such a car only on the condition that it has documents will not leave you with much to choose from. Now the documents for my '63 Oldsmobile have been misplaced by the agent I gave them to for having the car transferred to my name and I cannot find him and I plan to sell off this car and even though I still have the number plates I know for a fact that potential buyers may try to exploit the 'no papers' issue in order to get the car for the lowest price but I'll be having none of it. I know exactly whom I bought the car from with the papers and they will simply have to take my word for it that the car is bonafide and legal and not stolen or disputed property. As long as you feel confident and assured that the car is not disputed or stolen and you are buying it from the actual owner, you should have no concerns.
As for the Ford 'Lo, Hi, Max' joke, many may not know it but Henry Ford himself was Jewish.